curl --request PUT \
  --url https://core.ravenna.ai/api/request-type-custom-fields/relationships \
  --header 'Content-Type: application/json' \
  --header 'x-ravenna-api-token: <api-key>' \
  --data '{
  "updates": [
    {
      "id": "<string>",
      "parentId": "<string>"
    }
  ]
}'

[
  {
    "id": "<string>",
    "order": 123,
    "private": true,
    "requestTypeId": "<string>",
    "customField": {
      "id": "<string>",
      "workspaceId": "<string>",
      "key": "<string>",
      "label": "<string>",
      "description": "<string>",
      "required": true,
      "system": true,
      "config": null,
      "type": "TEXT",
      "options": [
        {
          "id": "<string>",
          "value": "<string>",
          "order": 123,
          "description": "<string>",
          "color": "<string>",
          "icon": "<string>",
          "customFieldId": "<string>",
          "createdAt": "<string>",
          "updatedAt": "<string>"
        }
      ],
      "createdAt": "<string>",
      "updatedAt": "<string>",
      "_count": {
        "requestTypeCustomField": 123
      }
    },
    "customFieldId": "<string>",
    "ticketField": "TITLE",
    "required": true,
    "createdAt": "<string>",
    "updatedAt": "<string>",
    "parentId": "<string>"
  }
]